| C. Light |
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| n | Light is the
part of the |
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| electromagnetic
spectrum that |
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| is visible to
humans |
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| n | The speed of
light symbol is c |
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| n | The speed of
light is constant, |
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| 3.00x108m/s
in air or a vacuum |
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| n | Instead of using
v=fλ, when |
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| it’s light you
can substitute |
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| c=fλ |
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